Grate bar fastener



May Z3, 1933. w w5o 1,910,985

GRATE BAR FASTENER Filed May 18, 1931 I 1/ zz EVE/V702 Patentedlvlay23,1933 i i i y i w TAT N eaA rE BAR rns'rmvna i lip ncatidn filedjna1a, ies1 .seria1, m. 538312;

invention relates to new land useful the fastening bar extendsand inwhich said lmprovementsfinf a grate bar fastener, and fastening bar isrotatable, said transverse has for one otlts Objects to prov de an e2 ropenings having entrance slots leading ceechnglysimpleand efiectvedevlceof this thereto of a Wldtll substantially the same y 5 charactertotemporarily hold or removably as the shorter diameter or minordimension; 55

secure grate bars against accidental disof the fasteningi barto permitthe passage placement regardless of the general conofthe grate bar overthe fastening bar, but hguration of said barsort lieapphance lnorpreventing the removal of the grate bar on which such barsare assembled.i When'the fastening bar is turned sothat its 3 Theinventiomisapplicable tostationary longer diameter or major dimensionlies 6 or movable grate barseiorwgrate structures acrossthe entranceslot. p a a, t or, all kinds regardlessofkthe intended use, With theseand other ends in view, this Whether furnaces, boilers, pallets,sinter'ing invention consists in the details ofconstru Il1 tCl1lI1s oranything"e1se,ibutit is particution-and combination ofelementshereinlarly valuablefor use for holding bars on a after set forth andthen specifically desigsupporting frame that has to be tilted or natedby the claim. M i inverted. y i y i Inorder that those skilled in theart to Another object of the invention isto roflwhich thisinv entionappertains may undertatably mount: fastening bar or vmember stand.hovvto make and use the same, I will 1520 in a suitable support orsupporting frame, describe its construction in detail, referring whichfastening bar is fiat por oblong in by numerals to the accompanyingdrawing crosssection so as to haveshort and long forming a part of thisapplication, in diameters and to position said fastening bar vvhich: i yy y forjcooperationflwitlr a part or parts of a ;Fig-. lyisya plan viewof a conventional Z grate bar or bars whereby when the longer gratestructure showing a plurality of grate diameter ofthe fastening bar isina subbars mounted upona support having, stantia'lly horizontal position,all of the interlocking engagement with a iastening grateYbars willbeziheld gagainst accidental bar rotatably mounted; in the support asemdisplacement or removal but when the fasbodied in myrinvention. I a ia 30 tening bar is turned at right angles any of i Fig. 2is afragmentary sectional View on 801 the gratebars may be removed orreplaced. the line file-20f Fig. 1.

a A further object of the invention is a to, Fig. 3 is a fragmentaryfrontelevationof i provide forremovably mounting fastenthesupport andthe fastening bar as well as ing barvand vvliich when inplace canberothe component partsthereof, but with the i a v i i W gratebars removedA still turtherobjeot of the invention is ,4 Fig; Lisa: fragmentarysectional view on to provide a grate fastener including, in decline 4-4of Fig. 3. i y y i y i combination, any suitablersup port orsup- ;Fig.,5 is a slightly enlarged"fragmentary portingqframe having an opening;through sectional view on the line 5- -5 of Fig I als onelof the Wallsofsutiicient size to permit In carrying out my invention as herein"thejgpassage of a fasteningcba r which is embodied, Gi-epresents asuitable supporter rectangular in cross sectiomthe ends of said frame-ofany desirable size or, configuration fastening bar {being fashioned toprov de in cludingend Walls 7 so called for conventl'unnions ournailedv1n the wallswof ,the ienoe of description, on which the endsof support,the bearing for i one of the trungrate bars 8, of suitable formatiomrestwhen 9 nionspreferably being a sleeve fitted into in operative position.Eachgrate bar is inthe open ng 1n" thesupport through wh ch dependent ofthe others and may be provided the {grate bar may pass, sa d fasteningbar :with any suitable spacing means 9 located at coopemating with gratebars provided With any. suitableplace along thebar and; of anytransverse circular openings through 'yvhich desirable :number. Eachgratebar is also 0 held against longitudinal movement in any desirablemanner, as providing the same with depending lugs 10 which engage thecontiguous parts of the frame. Another obvious way to preventlongitudinal movement is to set the ends of the grate bars in a recessor recesses in the end walls 7 of the frame. Of course, the parts are sofitted as to give a certain amount of play which will provide forlimited longitudinal or transverse movements of the several grate bars.

Each grate bar is provided with a transverse circular opening or hole 11having an entrance slot 12 leading thereto and I prefer that the holeand the slot be formed in a lobe 13 depending from each grate bar midwaythe length thereof so that lips 14 are produced for a purpose to bepresently described. I

The support or frame 6 also includes a rear wall 15 and a front wall 16,the former having a small opening therethrough to .provide a bearing forthe rear trunnion 17 of the fastening bar 18 while the front wall has anopening 19 therethrough, preferably circular in shape, although othershapes can be utilized, and at least as large as the opening 11 in eachgrate bar and in said opening 19 is removably mounted a sleeve 20 inwhich a hole 21 is formed to act as a bearing for the forward trunnion22 of the fastening bar 18. Said bar may be formed with a tool hold 23for the reception of a suitable tool, handle or crank for readilyrotating said fastening bar.

The intermediate part 24: of the fastening bar, or the portion betweenthe trunnions,'is of oblong shape in cross section so as to have a longdimension substantially the same as the diameter of the openings 19 and11 and a shorter dimension substantially equal to that of the width ofthe slot 12 so that a grate bar may be passed over the flat portion ofthe fastening bar 24 and the latter then rotated within the opening 11.With the fastening barin the position shown in Fig. 2, so that itsgreatest dimension extends'crosswise of the slot 12, said grate barscannot be displaced because the lips 14' under-lie the flat portion ofsaid fastening bar but when said fastening bar is rotated" a quarterturn so that its greatest diameter will be vertical and in alignmentwith the slots 12 any one or more of the grate bars maybe readily liftedand removed from the fastening bar.

"he fastening bar is also provided'with means to prevent accidentalwithdrawal thereof or undue longitudinal movement which means may be inthe form of pins 25 and 26, said pins being so mounted or constructed asto prevent the same from dropping out when the fastening bar is rotatedor when the complete structure is tilted or inverted. One of said pins,as 26,.acts as a holding means or bolt to maintain the fastening bar ina grate bar fastening position or with the greater dimension of the flatintermediate portion in a horizontal position, by engagement with a lug27 formed on or carried by the front wall 16. This pin can also beutilized to rotate the fastening bar and therefore the tool hold couldbe elim- .inated.

When originally assembling all of the grate bars in or on their frame,they can be placed in position and the fastening bar 18 then projectedthrough the opening 19 in the front wall 16 of the frame and through theholes 11 in all of the bars until the rear trunnion 17 is set in itshearing. The sleeve 20 can then be placed upon the forward trunnion 22and inserted in the opening 19 and finally the pins 25 and 26 inserted,with the pin 26 projecting into or through the lug 27 at which time allof the grate bars will be fastened in position against accidentaldisplacement. By reversing the above ac tions, all of the grate bars canbe removed. After the entire structure has been assembled and it isdesired tov remove or replace one or more, but possibly not all, of thegrate bars, the pin 26 is withdrawn from the lug 27 and the fasteningbar rotated until its longer dimension is vertical or in alignment'withthe slot 12. This unfastens the grate bars and the one or ones to beremoved or replaced can be readily taken off or put back on thefastening bar and when everything is ready, the fastening bar is rotatedin the opposite direction until its longer dimension is in a horizontalposition crosswise of the slot 12 and so long as the fastening'bar is inthis position the grate bars cannot be removed.

From the foregoing description, it will be obvious that I have providedan exceedingly simple and effective means for fastening gratebars inposition to preventtheir accidental displacement as when the frame istilted to a steep angle or actually inverted.

Of course, I do not wish to be limited to the exact details ofconstruction herein shown'and described as these may be varied withinthe limits of the appended claim without departing from the spirit of myinvention.

Having thus fully described my invention, what I claim as new and usefulis p A grate consisting of a stationary frame having an opening throughone of its walls, a sleeve in said opening, a fastening bar having afiat intermediate portion passable through said opening and journalledfor rotation in the rear wall of the frame and said sleeve, a pluralityof grate bars resting on said frame each having a transverse openingtherethrough and a slot leading thereto,

said grate bars being individually removable or replaceable when theflat portion of the fastening bar is in alignment With the slots andheld against accidental displacement when the flat portion of thefastening bar is crosswise of the slots, a 111g on the frame adjacentthe position of the fastening bar, and means carried by said fasteningbar for engagement with the lug t0 normally hold the fastening baragainst rotation.

In testimenywhereof, I have hereunto affixed my signature.

WVALTER H. CLAWSON.

